At some intersection the traffic signals have sensors
Asked by maham237 @ in Biology viewed by 253 People
At some intersections the traffic signals have sensors to detect vehicles, and the traffic signal will only change if
Answered by maham237 @
If a car has pulled up at the lights or there are cars idling waiting for the lights to change. The smart traffic lights use an inductor loop installed under the asphalt in the road next to the lights to detect cars. Some smart light use lasers for this detection.
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